| Patents for Rotary Power-Tool Co., Inc. |
Patents 1 -
5
of 5
      |
| Picture | Number | Date | Patentee | Title |
 | FR-482,422 | Mar. 20, 1917 | J.O. Berg | Tool for treating stone, concrete and other materials |
 | 1,223,359 | Apr. 24, 1917 | J.O. Berg | Tool for treating stone, concrete and other materials |
| | GB-106,701 | Jun. 07, 1917 | J.O. Berg | Tool for treating stone, concrete and other materials |
 | 1,230,842 | Jun. 26, 1917 | J.O. Berg | Tool for treating stone, concrete and other materials |
 | RE14,392 | Nov. 13, 1917 | J.O. Berg | Tool for treating stone, concrete and other material |
